Method of charging electret filter media
US5496507A · kind A · utility
278Cited by
34References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1994 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Aug 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/626
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge jets of water or a stream of water droplets at a pressure sufficient to provide the web with filtration enhancing electret charge and drying said web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.